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Outlook 2013 prompting for credentials after migration to Exchange 2016 RRS feed

  • Question

  • I've recently deployed Exchange 2016 alongside our Exchange 2010 environment and migrated about 30 users across for the pilot group. For users with outlook 2013 they are prompted repeatedly for their password even after they enter their correct credentials, when you click cancel, the 'need password' prompt from the bottom bar goes away and it returns to 'Connected to: Microsoft Exchange'. Approximately 15min later it prompts again.

    This issue does not happen for users with Outlook 2010. We do not have any public folders.

    My outlook anywhere settings are

    RunspaceId                         : 51eefd4d-bf1c-4b09-a660-79dcad3bcec8
    ServerName                         : Servername
    SSLOffloading                      : True
    ExternalHostname                   :
    InternalHostname                   : servername
    ExternalClientAuthenticationMethod : Negotiate
    InternalClientAuthenticationMethod : Ntlm
    IISAuthenticationMethods           : {Basic, Ntlm, Negotiate}
    XropUrl                            :
    ExternalClientsRequireSsl          : False
    InternalClientsRequireSsl          : False
    MetabasePath                       : IIS://servername/W3SVC/1/ROOT/Rpc
    Path                               : C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\rpc
    ExtendedProtectionTokenChecking    : None
    ExtendedProtectionFlags            : {}
    ExtendedProtectionSPNList          : {}
    AdminDisplayVersion                : Version 15.1 (Build 1261.35)
    Server                             : servername
    AdminDisplayName                   :
    ExchangeVersion                    : 0.20 (15.0.0.0)
    Name                               : Rpc (Default Web Site)
    DistinguishedName                  : CN=Rpc (Default Web Site),CN=HTTP,CN=Protocols,CN=servername,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative
                                         Groups,CN=CWLTHAG,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=,DC=,DC=,DC=

    Identity                           : Servername\Rpc (Default Web Site)
    Guid                               : aa15a8f0-2002-44e0-95a3-3399428e678b
    ObjectCategory                     : domain.com/Configuration/Schema/ms-Exch-Rpc-Http-Virtual-Directory
    ObjectClass                        : {top, msExchVirtualDirectory, msExchRpcHttpVirtualDirectory}
    WhenChanged                        : 31/08/2017 2:48:43 PM
    WhenCreated                        : 31/08/2017 2:48:26 PM
    WhenChangedUTC                     : 31/08/2017 4:48:43 AM
    WhenCreatedUTC                     : 31/08/2017 4:48:26 AM
    OrganizationId                     :
    Id                                 : servername\Rpc (Default Web Site)
    OriginatingServer                  : domain controller
    IsValid                            : True
    ObjectState                        : Changed

    My IIS settings are Windows Authentication Enabled with Enable Kernel-Mode Authentication. All other authentications are disabled. 

    Any help would be greatly appreciated. 

    Tuesday, October 3, 2017 11:10 PM

Answers

  • In case anyone else ever comes across this issue, this was the fix.

    https://technet.microsoft.com/en-us/library/ff808312(v=exchg.160).aspx

    • Marked as answer by Realidy Monday, October 9, 2017 1:56 AM
    Monday, October 9, 2017 1:56 AM

All replies

  • Hi,

    To troubleshooting your issue, I want to ensure:
    1. Does it occur on mailbox in Exchange 2016 or Exchange 2010?
    2. Is this issue arise on internal Outlook client or external?
    3. Does it occur while trying to access an additional store like a shared calendar or Online archive?

    Since the Outlook client works fine after enter proper credential, I suppose that the client experience this issue when access some shared mailbox or calendar from Exchange 2010.
    Please open the Outlook Connection Status to check the connection endpoint and its status if issue arise.

    Moreover, the MAPI over HTTP will be enabled by default if install Exchange 2016 to co-exist with Exchange 2010. Also, the Outlook client (2013, 2016) will use this protocol to connect to Exchange server if move mailbox from Exchange 2010 to 2016.
    Note: Outlook 2010 SP2 and updates KB2956191 and KB2965295 (April 14, 2015) can use MAPI over HTTP to connect to Exchange.

    Therefore, if this issue only occurs on Exchange 2016 mailbox, I recommend to check the setting for MAPI over HTTP:

     Get-MapiVirtualDirectory | FL

    Figure as below:


    Regards,

    Allen Wang


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, October 4, 2017 2:54 AM
    Moderator
  • Hi Allen,

    It is only happening to the mailboxes migrated to Exchange 2016 using Outlook 2013. The problem doesn't happen to users with Exchange 2010 or Outlook 2010.

    The issue is only on internal access, we don't allow external access to our environment. 

    It occurs when trying to access a standard user mailbox. The credentials are not required to open outlook or to continue using it. It just prompts for them. 

    Thank you for your help.

    Wednesday, October 4, 2017 3:12 AM
  • In case anyone else ever comes across this issue, this was the fix.

    https://technet.microsoft.com/en-us/library/ff808312(v=exchg.160).aspx

    • Marked as answer by Realidy Monday, October 9, 2017 1:56 AM
    Monday, October 9, 2017 1:56 AM
  • Great, thanks for your sharing.

    Regards,

    Allen Wang


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, October 9, 2017 2:48 AM
    Moderator